Refs #1102. Improved SysTick reset in STM32 ports.

git-svn-id: https://svn.code.sf.net/p/openblt/code/trunk@795 5dc33758-31d5-4daf-9ae8-b24bf3d40d73

Target/Source/ARMCM0_STM32F0/cpu.c

@@ -117,10 +117,10 @@ void CpuStartUserProgram(void)
   /* release the communication interface */
   ComFree();
 #endif
-  /* reset the timer */
-  TimerReset();
   /* reset the HAL */
   HAL_DeInit();
+  /* reset the timer */
+  TimerReset();
   /* enable system configuration peripheral, which is needed to remap the RAM later on */
   LL_APB1_GRP2_EnableClock(LL_APB1_GRP2_PERIPH_SYSCFG);
   /* copy user program vector's to RAM */

Target/Source/ARMCM0_STM32F0/timer.c

@@ -70,8 +70,10 @@ void TimerInit(void)
 ****************************************************************************************/
 void TimerReset(void)
 {
-  /* set the systick's status and control register back into the default reset value */
+  /* set the systick's registers back into the default reset value. */
   SysTick->CTRL = 0;
+  SysTick->LOAD = 0;
+  SysTick->VAL = 0;
 } /* end of TimerReset */
 
 

Target/Source/ARMCM0_STM32G0/cpu.c

@@ -111,10 +111,10 @@ void CpuStartUserProgram(void)
   /* release the communication interface */
   ComFree();
 #endif
-  /* reset the timer */
-  TimerReset();
   /* reset the HAL */
   HAL_DeInit();
+  /* reset the timer */
+  TimerReset();
   /* remap user program's vector table */
   SCB->VTOR = CPU_USER_PROGRAM_VECTABLE_OFFSET & (blt_int32u)0x1FFFFF80;
   /* set the address where the bootloader needs to jump to. this is the address of

Target/Source/ARMCM0_STM32G0/timer.c

@@ -70,8 +70,10 @@ void TimerInit(void)
 ****************************************************************************************/
 void TimerReset(void)
 {
-  /* set the systick's status and control register back into the default reset value */
+  /* set the systick's registers back into the default reset value. */
   SysTick->CTRL = 0;
+  SysTick->LOAD = 0;
+  SysTick->VAL = 0;
 } /* end of TimerReset */
 
 

Target/Source/ARMCM3_STM32F1/cpu.c

@@ -109,10 +109,10 @@ void CpuStartUserProgram(void)
   /* release the communication interface */
   ComFree();
 #endif
-  /* reset the timer */
-  TimerReset();
   /* reset the HAL */
   HAL_DeInit();
+  /* reset the timer */
+  TimerReset();
   /* remap user program's vector table */
   SCB->VTOR = CPU_USER_PROGRAM_VECTABLE_OFFSET & (blt_int32u)0x1FFFFF80;
   /* set the address where the bootloader needs to jump to. this is the address of

Target/Source/ARMCM3_STM32F1/timer.c

@@ -71,8 +71,10 @@ void TimerInit(void)
 ****************************************************************************************/
 void TimerReset(void)
 {
-  /* Set the systick's status and control register back into the default reset value. */
+  /* Set the systick's registers back into the default reset value. */
   SysTick->CTRL = 0;
+  SysTick->LOAD = 0;
+  SysTick->VAL = 0;
 } /* end of TimerReset */
 
 

Target/Source/ARMCM3_STM32F2/cpu.c

@@ -109,10 +109,10 @@ void CpuStartUserProgram(void)
   /* release the communication interface */
   ComFree();
 #endif
-  /* reset the timer */
-  TimerReset();
   /* reset the HAL */
   HAL_DeInit();
+  /* reset the timer */
+  TimerReset();
   /* remap user program's vector table */
   SCB->VTOR = CPU_USER_PROGRAM_VECTABLE_OFFSET & (blt_int32u)0x1FFFFF80;
   /* set the address where the bootloader needs to jump to. this is the address of

Target/Source/ARMCM3_STM32F2/timer.c

@@ -71,8 +71,10 @@ void TimerInit(void)
 ****************************************************************************************/
 void TimerReset(void)
 {
-  /* Set the systick's status and control register back into the default reset value. */
+  /* Set the systick's registers back into the default reset value. */
   SysTick->CTRL = 0;
+  SysTick->LOAD = 0;
+  SysTick->VAL = 0;
 } /* end of TimerReset */
 
 

Target/Source/ARMCM4_STM32F3/cpu.c

@@ -60,7 +60,8 @@ void CpuInit(void)
   /* bootloader runs in polling mode so disable the global interrupts. this is done for
    * safety reasons. if the bootloader was started from a running user program, it could 
    * be that the user program did not properly disable the interrupt generation of 
-   * peripherals. */
+   * peripherals.
+   */
   CpuIrqDisable();
 } /*** end of CpuInit ***/
 
@@ -109,10 +110,10 @@ void CpuStartUserProgram(void)
   /* release the communication interface */
   ComFree();
 #endif
-  /* reset the timer */
-  TimerReset();
   /* reset the HAL */
   HAL_DeInit();
+  /* reset the timer */
+  TimerReset();
   /* remap user program's vector table */
   SCB->VTOR = CPU_USER_PROGRAM_VECTABLE_OFFSET & (blt_int32u)0x1FFFFF80;
   /* set the address where the bootloader needs to jump to. this is the address of

Target/Source/ARMCM4_STM32F3/timer.c

@@ -71,8 +71,10 @@ void TimerInit(void)
 ****************************************************************************************/
 void TimerReset(void)
 {
-  /* Set the systick's status and control register back into the default reset value. */
+  /* Set the systick's registers back into the default reset value. */
   SysTick->CTRL = 0;
+  SysTick->LOAD = 0;
+  SysTick->VAL = 0;
 } /* end of TimerReset */
 
 

Target/Source/ARMCM4_STM32F4/cpu.c

@@ -60,7 +60,8 @@ void CpuInit(void)
   /* bootloader runs in polling mode so disable the global interrupts. this is done for
    * safety reasons. if the bootloader was started from a running user program, it could 
    * be that the user program did not properly disable the interrupt generation of 
-   * peripherals. */
+   * peripherals.
+   */
   CpuIrqDisable();
 } /*** end of CpuInit ***/
 
@@ -109,10 +110,10 @@ void CpuStartUserProgram(void)
   /* release the communication interface */
   ComFree();
 #endif
-  /* reset the timer */
-  TimerReset();
   /* reset the HAL */
   HAL_DeInit();
+  /* reset the timer */
+  TimerReset();
   /* remap user program's vector table */
   SCB->VTOR = CPU_USER_PROGRAM_VECTABLE_OFFSET & (blt_int32u)0x1FFFFF80;
   /* set the address where the bootloader needs to jump to. this is the address of

Target/Source/ARMCM4_STM32F4/timer.c

@@ -71,8 +71,10 @@ void TimerInit(void)
 ****************************************************************************************/
 void TimerReset(void)
 {
-  /* Set the systick's status and control register back into the default reset value. */
+  /* Set the systick's registers back into the default reset value. */
   SysTick->CTRL = 0;
+  SysTick->LOAD = 0;
+  SysTick->VAL = 0;
 } /* end of TimerReset */
 
 

Target/Source/ARMCM4_STM32L4/cpu.c

@@ -60,7 +60,8 @@ void CpuInit(void)
   /* bootloader runs in polling mode so disable the global interrupts. this is done for
    * safety reasons. if the bootloader was started from a running user program, it could 
    * be that the user program did not properly disable the interrupt generation of 
-   * peripherals. */
+   * peripherals.
+   */
   CpuIrqDisable();
 } /*** end of CpuInit ***/
 
@@ -109,10 +110,10 @@ void CpuStartUserProgram(void)
   /* release the communication interface */
   ComFree();
 #endif
-  /* reset the timer */
-  TimerReset();
   /* reset the HAL */
   HAL_DeInit();
+  /* reset the timer */
+  TimerReset();
   /* remap user program's vector table */
   SCB->VTOR = CPU_USER_PROGRAM_VECTABLE_OFFSET & (blt_int32u)0x1FFFFF80;
   /* set the address where the bootloader needs to jump to. this is the address of

Target/Source/ARMCM4_STM32L4/timer.c

@@ -71,8 +71,10 @@ void TimerInit(void)
 ****************************************************************************************/
 void TimerReset(void)
 {
-  /* Set the systick's status and control register back into the default reset value. */
+  /* Set the systick's registers back into the default reset value. */
   SysTick->CTRL = 0;
+  SysTick->LOAD = 0;
+  SysTick->VAL = 0;
 } /* end of TimerReset */
 
 

Target/Source/ARMCM7_STM32F7/cpu.c

@@ -110,10 +110,10 @@ void CpuStartUserProgram(void)
   /* release the communication interface */
   ComFree();
 #endif
-  /* reset the timer */
-  TimerReset();
   /* reset the HAL */
   HAL_DeInit();
+  /* reset the timer */
+  TimerReset();
   /* remap user program's vector table */
   SCB->VTOR = CPU_USER_PROGRAM_VECTABLE_OFFSET & (blt_int32u)0x1FFFFF80;
   /* set the address where the bootloader needs to jump to. this is the address of

Target/Source/ARMCM7_STM32F7/timer.c

@@ -71,8 +71,10 @@ void TimerInit(void)
 ****************************************************************************************/
 void TimerReset(void)
 {
-  /* Set the systick's status and control register back into the default reset value. */
+  /* Set the systick's registers back into the default reset value. */
   SysTick->CTRL = 0;
+  SysTick->LOAD = 0;
+  SysTick->VAL = 0;
 } /* end of TimerReset */